public class BookTest {
    public static void main(String[] args) {
        Book book=new Book();
        String info=book.getBookInfo();


        System.out.println(info);
        String bookNameSetBefore=book.getBookName();
        System.out.println("------------------------");
        System.out.println(bookNameSetBefore);


        book.setBookName("三国演义");
        String bookNameSetAfter=book.getBookName();
        System.out.println(bookNameSetAfter);
        System.out.println("------------------------");


        book.setPrice(100);
        book.setAuthor("罗贯中");
        book.setPublisher("新华出版社");

    }

}
